Asterisk Cookbook: Solutions to Everyday Telephony Problems by Leif Madsen

By Leif Madsen

Asterisk has a wealth of gains that will help you customise your PBX to fill very particular company wishes. This brief cookbook bargains recipes for tackling dialplan basics, making and controlling calls, and tracking channels on your PBX atmosphere. every one recipe incorporates a basic code answer you could positioned to paintings instantly, in addition to a close dialogue that gives perception into why and the way the recipe works.

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Extra resources for Asterisk Cookbook: Solutions to Everyday Telephony Problems

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With our current dialplan, the DTMF can be adjusted by the caller, which may not necessarily be what we want. info need to execute a subroutine on the other channel just prior to bridging. We can do this with the U() option to the Dial() application: exten => 100,1,Verbose(2,Incoming call from ${CALLERID(all)}) same => n,Dial(SIP/0000FFFF0001,30,U(VolumeAdjustment^3)) same => n,Hangup() exten => s,1,Verbose(2,Adjusting volume for other channel) same => n,Set(VOLUME(RX,p)=${ARG1}) same => n,Return() We could use the IF() function to control whether the subroutine is executed by the Dial() application: same => n,Dial(SIP/0000FFFF0001,30,${IF($[${CALLERID(num) = 12565551212]?

7, we need to make sure the SPYGROUP channel variable is set on the channel we want to spy on and whisper to. In order to do this, we need to use the U() option of Dial(), which will execute a subroutine which sets the channel variable on the called channel verses the calling channel. info same => n,Set(SPYGROUP=${ARG1}) same => n,Return() We can make sure the channel variable SPYGROUP was set on the correct channel by using the core show channel CLI command at the Asterisk console. In our example, the device 0000FFFF0004 placed a call to 0000FFFF0001 using the dialplan we just wrote.

Conf has some other features that are configured and enabled in this same manner. conf and then enable the feature on a per-call basis using arguments to the Dial() or Queue() applications. Here is a list of all of the features in the featuremap section: blindxfer DTMF triggered blind transfers. Enable it using the t and/or T options to Dial() or Queue(). atxfer DTMF triggered attended transfers. Enable it using the t and/or T options to Dial() or Queue(). disconnect DTMF triggered call hangup.

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